Clean Water Act discharge permit · NPDES ND0000248
TESORO REFINING MANDAN, Mandan, ND: NPDES ND0000248 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
TESORO REFINING MANDAN, held by Tesoro Refining, holds NPDES permit ND0000248, which discharges to Painted Woods-Square Butte. EPA’s file records it issued March 28, 2018 and expiring March 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | TESORO REFINING MANDAN |
|---|---|
| Permittee as filed | Tesoro Refining |
| NPDES ID | ND0000248 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 28, 2018 |
| Expiration date | March 31, 2023 |
| Issuing agency | North Dakota Department of Environmental Quality |
| Address | Mandan, ND 58554 |
| Receiving water | Painted Woods-Square Butte |
| Subwatershed | Rock Haven Creek-Missouri River (HUC 101301011005) |
| Other EPA IDs (FRS) | RCRA handler NDD006175467; ICIS-AIR source ND0000003805900003 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 20Pollutants on file
- 20Under a numeric limit
- 20With a violation of any kind
- 8With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 14 | 43 | 27 | October 31, 2024 | 462% over the limit |
| Sulfide, total [as S] | 14 | 25 | 9 | July 31, 2026 | 1,720% over the limit |
| pH | 4 | 8 | 4 | June 30, 2023 | |
| Nitrogen, ammonia total [as N] | 14 | 19 | 3 | March 31, 2013 | 50% over the limit |
| BOD, 5-day, 20 deg. C | 14 | 23 | 2 | July 31, 2026 | 22% over the limit |
| Phenolic compounds, unchlorinated | 14 | 17 | 1 | July 31, 2016 | 185% over the limit |
| Oxygen demand, chem. [COD], dissolved | 12 | 13 | 1 | June 30, 2009 | 20% over the limit |
| Toxic Units Static 48HR Acute Ceriodaphnia dubia | 1 | 2 | 1 | September 30, 2022 | 29% over the limit |
| Oil & Grease | 14 | 16 | 0 | ||
| Chromium, hexavalent [as Cr] | 14 | 16 | 0 | ||
| Chromium, total [as Cr] | 14 | 16 | 0 | ||
| Chloride [as Cl] | 9 | 9 | 0 | ||
| Sulfates, total [as SO4] | 9 | 9 | 0 | ||
| Nitrogen, total [as N] | 6 | 6 | 0 | ||
| Phosphorus, total [as P] | 6 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Chemical Oxygen Demand [COD] | 2 | 4 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| TU LC50 Static Renewal 96Hr Acute Pimephales promelas | 1 | 1 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES ND0000248.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| July 21, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES ND0000248.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, ND0000248.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID ND0000248 there.
TESORO REFINING MANDAN, Mandan, North Dakota: Individual permit ND0000248, held by Tesoro Refining; Administratively continued (past its expiration date and still in force until reissued); issued March 28, 2018, term to March 31, 2023, by North Dakota Department of Environmental Quality; discharges to Painted Woods-Square Butte.
- Solids, total suspended: 14 limits, 43 violations of any kind, 27 effluent exceedances, latest October 31, 2024, largest 462% over the limit.
- Sulfide, total [as S]: 14 limits, 25 violations of any kind, 9 effluent exceedances, latest July 31, 2026, largest 1,720% over the limit.
- pH: 4 limits, 8 violations of any kind, 4 effluent exceedances, latest June 30, 2023.
- Nitrogen, ammonia total [as N]: 14 limits, 19 violations of any kind, 3 effluent exceedances, latest March 31, 2013, largest 50% over the limit.
- BOD, 5-day, 20 deg. C: 14 limits, 23 violations of any kind, 2 effluent exceedances, latest July 31, 2026, largest 22% over the limit.
- Phenolic compounds, unchlorinated: 14 limits, 17 violations of any kind, 1 effluent exceedance, latest July 31, 2016, largest 185% over the limit.
- Oxygen demand, chem. [COD], dissolved: 12 limits, 13 violations of any kind, 1 effluent exceedance, latest June 30, 2009, largest 20% over the limit.
- Toxic Units Static 48HR Acute Ceriodaphnia dubia: 1 limit, 2 violations of any kind, 1 effluent exceedance, latest September 30, 2022, largest 29% over the limit.
- Oil & Grease: 14 limits, 16 violations of any kind.
- Chromium, hexavalent [as Cr]: 14 limits, 16 violations of any kind.
- Chromium, total [as Cr]: 14 limits, 16 violations of any kind.
- Chloride [as Cl]: 9 limits, 9 violations of any kind.
- Sulfates, total [as SO4]: 9 limits, 9 violations of any kind.
- Nitrogen, total [as N]: 6 limits, 6 violations of any kind.
- Phosphorus, total [as P]: 6 limits, 6 violations of any kind.
- Flow, in conduit or thru treatment plant: 4 limits, 4 violations of any kind.
- Chemical Oxygen Demand [COD]: 2 limits, 4 violations of any kind.
- Flow, total: 1 limit, 1 violation of any kind.
- Flow, total: 1 limit, 1 violation of any kind.
- TU LC50 Static Renewal 96Hr Acute Pimephales promelas: 1 limit, 1 violation of any kind.
- July 21, 2026: Evaluation (S).
TESORO REFINING MANDAN among its neighbors
44 discharge permits are in the Rock Haven Creek-Missouri River subwatershed (HUC 101301011005); ND0000248 is one. Its county: 88, 2 major; ND0000248 is major permit.
Other permits in the Rock Haven Creek-Missouri River subwatershed (HUC 101301011005)
- AMES CONSTRUCTION FOR BNSF RAILWAY COMPANY, Unknown: NDG071045, minor, term to 2030-03-31
- BIG SKY ESTATES 3RD ADDITION, (Unknown City): NDR111850, minor, term to 2025-03-31
- BISMARCK CITY OF, Bismarck: ND0023434, major, term to 2023-06-30
- BISMARCK WTP, Bismarck: ND0027093, minor, term to 2031-06-30
- BISMARCK WTP, Bismarck: NDG520361, minor, term to 2024-03-31
- BNSF RAILWAY COMPANY - BNSF BRIDGE NO. 196.6 OVER MISSOURI RIVER, (Unknown City): NDR112163, minor, term to 2025-03-31
- CHS INC., Mandan: NDR320784, minor, term to 2024-12-31
- CITY OF MANDAN, Unknown: NDG071058, minor, term to 2030-03-31
- CITY OF MANDAN, Mandan: NDR111825, minor, term to 2025-03-31
- COVE AT LAKEWOOD, Mandan: NDR113860, minor, term to 2030-03-31
Nearby on the register
- Discharge permits in Mandan
- Every permit record in Mandan, A to Z
- Discharge permits in North Dakota
- Every permit record in North Dakota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.
What this page shows
This public-records page covers NPDES permit ND0000248 for TESORO REFINING MANDAN in Mandan, ND, held by Tesoro Refining and discharging to Painted Woods-Square Butte, with a permit status of administratively continued and a Major Discharger class. The page lists 20 pollutants under a numeric limit and 8 pollutants with an effluent exceedance.